diff --git a/libc/src/unistd/linux/lseek.cpp b/libc/src/unistd/linux/lseek.cpp
--- a/libc/src/unistd/linux/lseek.cpp
+++ b/libc/src/unistd/linux/lseek.cpp
@@ -23,12 +23,10 @@
 #ifdef SYS_lseek
   int ret = __llvm_libc::syscall_impl<int>(SYS_lseek, fd, offset, whence);
   result = ret;
-#elif defined(SYS_llseek)
-  long ret = __llvm_libc::syscall_impl(SYS_llseek, fd,
-                                       (long)(((uint64_t)(offset)) >> 32),
-                                       (long)offset, &result, whence);
-  result = ret;
-#elif defined(SYS__llseek)
+#elif defined(SYS_llseek) || defined(SYS__llseek)
+#ifdef SYS_llseek
+#define SYS__llseek SYS_llseek
+#endif
   int ret = __llvm_libc::syscall_impl<int>(SYS__llseek, fd, offset >> 32,
                                            offset, &result, whence);
 #else